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2. Marty Mcfly
To perform a surprise sex act by first pointing and Yelling "WHAT THE HELL IS THAT!!" and acting upon once your partner is distracted
Dude my girlfriend wouldn't do anal so i pulled the Marty Mcfly and did it anyway
1. marty mcfly
noun: a puffy vest, usually made of down, as worn by Marty McFly in Back to the Future.
It is a little bit chilly today. I better wear my marty mcfly.
3. Marty McFly
To hit someone and run.
He keyed my car so I did a Marty McFly and drove off before he could catch me.
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